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WO2018095921A1 - Circuit d'attaque, en particulier pour une cellule de pockels, et procédé permettant de faire fonctionner un circuit d'attaque - Google Patents

Circuit d'attaque, en particulier pour une cellule de pockels, et procédé permettant de faire fonctionner un circuit d'attaque Download PDF

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Publication number
WO2018095921A1
WO2018095921A1 PCT/EP2017/079953 EP2017079953W WO2018095921A1 WO 2018095921 A1 WO2018095921 A1 WO 2018095921A1 EP 2017079953 W EP2017079953 W EP 2017079953W WO 2018095921 A1 WO2018095921 A1 WO 2018095921A1
Authority
WO
WIPO (PCT)
Prior art keywords
voltage
driver circuit
driver
transistor
current
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/EP2017/079953
Other languages
German (de)
English (en)
Inventor
Thomas Kaiser
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Trumpf Laser GmbH
Original Assignee
Trumpf Laser GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Trumpf Laser GmbH filed Critical Trumpf Laser GmbH
Publication of WO2018095921A1 publication Critical patent/WO2018095921A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/51—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used
    • H03K17/56—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices
    • H03K17/687—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors
    • H03K17/689—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors with galvanic isolation between the control circuit and the output circuit
    • H03K17/691—Electronic switching or gating, i.e. not by contact-making and –breaking characterised by the components used by the use, as active elements, of semiconductor devices the devices being field-effect transistors with galvanic isolation between the control circuit and the output circuit using transformer coupling
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
    • H03K17/16—Modifications for eliminating interference voltages or currents
    • H03K17/161—Modifications for eliminating interference voltages or currents in field-effect transistor switches
    • H03K17/162—Modifications for eliminating interference voltages or currents in field-effect transistor switches without feedback from the output circuit to the control circuit
    • H03K17/163—Soft switching

Definitions

  • Driver circuit in particular for a Pockels cell and method for operating a driver circuit
  • the invention relates to a driver circuit, in particular for a Pockels cell, having at least one high-voltage switching element which is driven by the secondary winding of a transformer, wherein a driver transistor, which is driven by a transistor driver, is connected in series with the primary winding of the transformer.
  • the invention relates to a method for operating a driver circuit, in particular a Pockelszellentreiberscaria, with at least one high-voltage switching element, which is driven by the secondary winding of a transformer, wherein a driver transistor, which is driven by a transistor driver, is connected in series with the primary winding of the transformer ,
  • Pockels cells are used together with other optical components such as polarizers in electro-optical modulators and can thus be used as a coupling-in and Einkoppler for electromagnetic radiation in lasers.
  • a variable voltage is applied to the Pockels cell.
  • they can be used in lasers, for example, to generate pulses in the regenerative amplifiers or also according to the "cavity dump" principle
  • the voltage is controlled by means of a Pockels cell driver circuit.
  • the laser When using the laser in material processing, the laser usually has to deliver ultrashort pulses with high energy.
  • the laser beam is coupled into the optical amplifier via the Pockels cell, passes through it until the required energy is reached and is then decoupled again.
  • the switching process must take place within a circulation time in the resonator of the regenerative amplifier. It is true that the shorter the switching time (steep switching edge), the more switching cycles can be achieved within a given amplification time (high clock rate).
  • the activation of Pockels cells often proves difficult.
  • high voltages are required, which must be applied or switched off in a short time.
  • a driver circuit in particular for a Pockels cell, with at least one high-voltage switching element, which is driven by the secondary winding of a transformer, wherein a driver transistor, which is driven by a transistor driver, is connected in series with the primary winding of the transformer, wherein an additional Primary current setting device for adjusting the primary current, in particular a flank of the primary current, is provided in a primary current path.
  • a driver circuit in particular for a Pockels cell, with at least one high-voltage switching element, which is driven by the secondary winding of a transformer, wherein a driver transistor, which is driven by a transistor driver, is connected in series with the primary winding of the transformer, wherein an additional Primary current setting device for adjusting the primary current, in particular a flank of the primary current, is provided in a primary current path.
  • the secondary-side drive current for driving the high-voltage switching element can also be influenced indirectly via a limitation of the primary-side current.
  • the influence on the primary side has the advantage that the current setting acts directly on all high voltage switching elements.
  • all high-voltage switching elements can be controlled synchronously.
  • the Primärstromeinstell Stein may have a resistor which is arranged in the primary current path.
  • a resistor By a resistor, the primary current and thus the switching operation of the high-voltage switching elements can be directly influenced.
  • the primary current can be limited by a resistor in the primary current path.
  • the resistor between the driver transistor and ground can be switched. This results in a negative feedback and thus a current limit.
  • the resistor may be connected between the primary winding and the driver transistor. The switching edge at the output of the driver circuit then depends directly on the resistance value.
  • the Primärstromeinstell shark includes an adjustable voltage source, which represents the voltage supply of the transistor driver.
  • the primary current can thus be set via the supply voltage of the transistor driver and via the current negative feedback.
  • the primary current has a direct influence on the drive current on the secondary side of the transformer for switching the high-voltage switching element.
  • the Primärstromeinstell Rheinwald Rhein comprises a current-limited voltage source.
  • This can represent the voltage supply of the transistor driver.
  • it may be a current-limited voltage source act adjustable output current. Due to the current limitation in the power supply, the negative feedback, so in particular the contradiction between the driver transistor and ground omitted.
  • the driver circuit may comprise a current limiting unit for voltage and power supply in the primary current paths.
  • the current limiting unit may be a current limited voltage source.
  • a power source with a regulated current and a maximum voltage is also conceivable.
  • the limited current or the current of the power source can be regulated and / or adjustable. Then it can be set more flexible, for example, by a stored in a control unit program, and does not have to be done by replacing the resistors.
  • series-connected high-voltage switching elements can be provided, the series circuit comprising high-voltage switching elements having two output terminals, in particular for connecting a Pockels cell. By using multiple series-connected high-voltage switching elements higher voltages can be switched.
  • Each high-voltage switching element can be assigned a separate transformer for switching on and a separate transformer for switching off. Alternatively, it is conceivable that each high-voltage switching element is assigned a separate transformer for switching on and off.
  • At least one high-voltage switching element for switching on the voltage at the Pockels cell and at least one high-voltage switching element for switching off the voltage at the Pockels cell can be provided. Furthermore, a plurality of high-voltage switching elements connected in series for switching on the voltage at the Pockels cell and a plurality of high voltage switching elements connected in series for switching off the voltage at the Pockels cell be provided.
  • a resistor may be connected between the secondary winding and the drive connection of the high-voltage switching element.
  • oscillations can be damped.
  • Each high voltage switching element may be connected to a respective transformer for turning on and the primary windings of the transformer may be connected in series.
  • the primary current it is important that the same current flows through all the transducers at the same time. This can be ensured in this way.
  • Each high voltage switching element may be connected to a respective transformer for turning off and the primary windings of the transformer may be connected in series. Again, there are the same advantages that the identical current flows through all transformers, so that a synchronous switching is ensured.
  • a driver circuit can be assigned to the transformer (s) for switching on and to the transformer (s) for switching off.
  • the high voltage switching elements for turning on and off the voltage for the Pockels cell can be controlled separately from each other.
  • the scope of the invention also includes a method for operating a driver circuit, in particular a Pockels cell driver circuit, with at least one high-voltage switching element which is driven by the secondary winding of a transformer, wherein a driver transistor, which is driven by a transistor driver, is connected in series with the primary winding of the transformer, wherein the switching edge is set at the output of the driver circuit by the current is adjusted by one of the primary windings containing primary current path. There is thus an indirect adjustment of the switching edge by the adjustment of the current in the primary current path.
  • the current can be adjusted by a resistor in the primary current path, in particular limited.
  • the resistor may be connected to one of the power terminals of a driver transistor.
  • the current is adjusted by a voltage source supplying the transistor driver with voltage.
  • a voltage source supplying the transistor driver with voltage.
  • either the voltage of the voltage source can be adjusted or it can be set the output current of a current-limited voltage source.
  • FIG. 1 shows a first embodiment of a driver circuit
  • FIG. 2 shows a second embodiment of a driver circuit.
  • circuit elements are "connected”, “electrically connected” or “coupled” with each other, this may mean that the elements mentioned directly, ie without further elements therebetween, However, it may also mean that said elements are not directly coupled to each other and that further elements are coupled between said elements.
  • a driver circuit 1 for a Pockels cell 2 which can be connected to two output terminals 3, 4 of the driver circuit 1.
  • the output terminals 3, 4 are located at nodes of a series circuit of high voltage switching elements 5a to 5d.
  • transmissions 6a to 6h are provided.
  • the secondary windings 7a to 7h are connected to the drive terminals of the high-voltage switching elements 5a to 5d.
  • the primary windings 8a to 8d are connected in series and form a first primary current path 10, wherein a driver transistor 11 and a resistor 12 are part of the primary current path 10.
  • the primary windings 9a to 9d are also connected in series and form a second primary current path 13, which also has a driver transistor 14 and a series resistor 15.
  • the arranged in the primary current paths 10, 13 resistors 12, 15 provide a negative feedback and thus for a limitation of
  • a current-limiting unit 22 for voltage and power supply in the primary current paths 10, 13 may be provided.
  • the current limiting unit 22 may be a current limited voltage source. Also conceivable is a power source with a regulated current and a maximum voltage.
  • the driver transistors 11, 14 are each driven by a transistor driver 16, 17.
  • the transistor drivers 16, 17 are supplied with voltage by a voltage source 18, 19, the voltage sources 18, 19 being designed as adjustable voltage sources or as current-limited voltage sources. If they are designed as current-limited voltage sources, the resistors 12, 15 can be omitted.
  • a switching signal for turning on the voltage which is output at the output terminals 3, 4, predetermined.
  • a switching signal for turning off the voltage applied to the Pockels cell 2 is input.
  • the slope of the edge of the voltage at the output terminals can be influenced by the voltage sources 18, 19.
  • FIG. 1 also shows that, for each transistor 5a to 5d, a separate transformer 6a, 6c, 6e, 6g for switching on the transistor 5a to 5d has its own transformer 6b, 6d, 6f, 6h for switching off the transistor Transistors 5a to 5d is provided.
  • resistors 23a to 23d may be provided between the secondary windings 7a to 7h and the control terminals of the transistors 5a to 5d.
  • FIG. 2 shows an alternative embodiment of a driver circuit 100.
  • the driver circuit 100 differs from the driver circuit 1 according to FIG. 1 in that the primary current paths 10, 13 do not contain the resistors 12, 15 between the driver transistors 11, 14 and ground, but resistors 101, 102 between the primary windings 8a to 8d and 9a to 9d and the driver transistors 11, 14 are arranged.
  • This can also be a current limit.
  • the power supplies 18, 19 are designed as current-limited voltage sources. In particular, by the voltage sources 18, 19, the slope of the edge of the voltage, which is output at the output terminals 3, 4.
  • resistors 101a, 102a may also be provided in the primary current paths 10, 13, for example between the primary windings 8a or 9a and the current and voltage supply formed in this case as the current-limiting unit 22.
  • the resistors 101, 102, 101a, 102a can also be divided into a plurality of resistors in the primary current paths 10, 13 may be arranged, ie between the primary windings 8a to 8d and 9a to 9d. If the resistors 101, 102, 101a, 102a are present, the current and voltage supply need not be designed as a current-limiting unit.
  • a current-limiting unit 22 for voltage and current supply in the primary current paths 10, 13 may be provided.
  • the current limiting unit 22 may be a current limited voltage source. Also conceivable is a power source with a regulated current and a maximum voltage.
  • the adjustment of the steepness of the edge of the voltage output at the output terminals 3, 4 can be made by selecting the resistance values of the resistors 101, 102, 101a, 102a.
  • the slope of the flank can alternatively or additionally be adjusted by the current-limiting unit 22.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Electronic Switches (AREA)

Abstract

L'invention concerne un circuit d'attaque (1), en particulier pour une cellule de Pockels (2). Le circuit comprend au moins un élément de commutation haute tension (5a-5d), qui est commandé par l'enroulement secondaire (7a-7h) d'un transmetteur (6a-6h). Un transistor d'attaque (11, 14), qui est commandé par un dispositif de commande (16, 17) de transistor, est raccordé en série à l'enroulement primaire (8a-8d, 9a-9d) du transmetteur (6a-6h). L'invention est caractérisée en ce qu'un dispositif de réglage de courant primaire supplémentaire destiné au réglage du courant primaire, en particulier d'un flanc du courant primaire, est prévu dans un trajet de courant primaire (10, 13).
PCT/EP2017/079953 2016-11-24 2017-11-21 Circuit d'attaque, en particulier pour une cellule de pockels, et procédé permettant de faire fonctionner un circuit d'attaque Ceased WO2018095921A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102016223314.9A DE102016223314A1 (de) 2016-11-24 2016-11-24 Treiberschaltung, insbesondere für eine Pockelszelle und Verfahren zum Betrieb einer Treiberschaltung
DE102016223314.9 2016-11-24

Publications (1)

Publication Number Publication Date
WO2018095921A1 true WO2018095921A1 (fr) 2018-05-31

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Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2017/079953 Ceased WO2018095921A1 (fr) 2016-11-24 2017-11-21 Circuit d'attaque, en particulier pour une cellule de pockels, et procédé permettant de faire fonctionner un circuit d'attaque

Country Status (2)

Country Link
DE (1) DE102016223314A1 (fr)
WO (1) WO2018095921A1 (fr)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3945669A1 (fr) 2020-07-27 2022-02-02 TRUMPF Huettinger Sp. Z o. o. Unité de commutation haute tension, ensemble d'impulsion et procédé permettant d'éviter les déséquilibres de tension dans un commutateur haute tension
EP3945541A1 (fr) 2020-07-29 2022-02-02 TRUMPF Huettinger Sp. Z o. o. Ensemble d'impulsion, agencement d'alimentation électrique et procédé utilisant l'ensemble
EP3952083A1 (fr) 2020-08-06 2022-02-09 TRUMPF Huettinger Sp. Z o. o. Unité de commutation haute tension
DE102021115470B3 (de) 2021-06-15 2022-07-14 Spree Hybrid Und Kommunikationstechnik Gmbh Hochleistungsschaltmodul zur direkten Pulsenergiespeisung eines Verbrauchers

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222606A1 (de) 2012-12-10 2014-06-26 Trumpf Laser Gmbh + Co. Kg Pockelszellentreiberschaltung und Verfahren zum Betrieb einer Pockelszelle
DE102013212099A1 (de) 2013-06-25 2015-01-08 Trumpf Laser Gmbh Hochspannungsmodulation ohne Schleppfehler
US20150222263A1 (en) * 2013-07-30 2015-08-06 Panasonic Intellectual Property Management Co., Ltd. Gate drive circuit
DE102014111774A1 (de) 2014-08-18 2016-02-18 AMOtronics UG Anordnung und Verfahren zum Modulieren von Laserpulsen

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3855116B2 (ja) * 2000-03-22 2006-12-06 日本光電工業株式会社 半導体スイッチ駆動回路
JP6394421B2 (ja) * 2015-01-30 2018-09-26 株式会社デンソー 半導体スイッチング素子の駆動装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102012222606A1 (de) 2012-12-10 2014-06-26 Trumpf Laser Gmbh + Co. Kg Pockelszellentreiberschaltung und Verfahren zum Betrieb einer Pockelszelle
DE102013212099A1 (de) 2013-06-25 2015-01-08 Trumpf Laser Gmbh Hochspannungsmodulation ohne Schleppfehler
US20150222263A1 (en) * 2013-07-30 2015-08-06 Panasonic Intellectual Property Management Co., Ltd. Gate drive circuit
DE102014111774A1 (de) 2014-08-18 2016-02-18 AMOtronics UG Anordnung und Verfahren zum Modulieren von Laserpulsen

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